2 * net/dsa/dsa.c - Hardware switch handling
3 * Copyright (c) 2008-2009 Marvell Semiconductor
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
12 #include <linux/device.h>
13 #include <linux/list.h>
14 #include <linux/platform_device.h>
15 #include <linux/slab.h>
16 #include <linux/module.h>
18 #include <linux/of_mdio.h>
19 #include <linux/of_platform.h>
20 #include <linux/of_net.h>
21 #include <linux/of_gpio.h>
22 #include <linux/netdevice.h>
23 #include <linux/sysfs.h>
24 #include <linux/phy_fixed.h>
25 #include <linux/gpio/consumer.h>
26 #include <linux/etherdevice.h>
30 static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
31 struct net_device *dev)
33 /* Just return the original SKB */
37 static const struct dsa_device_ops none_ops = {
38 .xmit = dsa_slave_notag_xmit,
42 const struct dsa_device_ops *dsa_device_ops[DSA_TAG_LAST] = {
43 #ifdef CONFIG_NET_DSA_TAG_DSA
44 [DSA_TAG_PROTO_DSA] = &dsa_netdev_ops,
46 #ifdef CONFIG_NET_DSA_TAG_EDSA
47 [DSA_TAG_PROTO_EDSA] = &edsa_netdev_ops,
49 #ifdef CONFIG_NET_DSA_TAG_TRAILER
50 [DSA_TAG_PROTO_TRAILER] = &trailer_netdev_ops,
52 #ifdef CONFIG_NET_DSA_TAG_BRCM
53 [DSA_TAG_PROTO_BRCM] = &brcm_netdev_ops,
55 #ifdef CONFIG_NET_DSA_TAG_QCA
56 [DSA_TAG_PROTO_QCA] = &qca_netdev_ops,
58 #ifdef CONFIG_NET_DSA_TAG_MTK
59 [DSA_TAG_PROTO_MTK] = &mtk_netdev_ops,
61 #ifdef CONFIG_NET_DSA_TAG_LAN9303
62 [DSA_TAG_PROTO_LAN9303] = &lan9303_netdev_ops,
64 [DSA_TAG_PROTO_NONE] = &none_ops,
67 int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct device *dev,
68 struct dsa_port *dport, int port)
70 struct device_node *port_dn = dport->dn;
71 struct phy_device *phydev;
74 if (of_phy_is_fixed_link(port_dn)) {
75 ret = of_phy_register_fixed_link(port_dn);
77 dev_err(dev, "failed to register fixed PHY\n");
80 phydev = of_phy_find_device(port_dn);
82 mode = of_get_phy_mode(port_dn);
84 mode = PHY_INTERFACE_MODE_NA;
85 phydev->interface = mode;
87 genphy_config_init(phydev);
88 genphy_read_status(phydev);
89 if (ds->ops->adjust_link)
90 ds->ops->adjust_link(ds, port, phydev);
92 put_device(&phydev->mdio.dev);
98 const struct dsa_device_ops *dsa_resolve_tag_protocol(int tag_protocol)
100 const struct dsa_device_ops *ops;
102 if (tag_protocol >= DSA_TAG_LAST)
103 return ERR_PTR(-EINVAL);
104 ops = dsa_device_ops[tag_protocol];
107 return ERR_PTR(-ENOPROTOOPT);
112 int dsa_cpu_port_ethtool_setup(struct dsa_switch *ds)
114 struct net_device *master;
115 struct ethtool_ops *cpu_ops;
117 master = ds->dst->master_netdev;
118 if (ds->master_netdev)
119 master = ds->master_netdev;
121 cpu_ops = devm_kzalloc(ds->dev, sizeof(*cpu_ops), GFP_KERNEL);
125 memcpy(&ds->dst->master_ethtool_ops, master->ethtool_ops,
126 sizeof(struct ethtool_ops));
127 ds->dst->master_orig_ethtool_ops = master->ethtool_ops;
128 memcpy(cpu_ops, &ds->dst->master_ethtool_ops,
129 sizeof(struct ethtool_ops));
130 dsa_cpu_port_ethtool_init(cpu_ops);
131 master->ethtool_ops = cpu_ops;
136 void dsa_cpu_port_ethtool_restore(struct dsa_switch *ds)
138 struct net_device *master;
140 master = ds->dst->master_netdev;
141 if (ds->master_netdev)
142 master = ds->master_netdev;
144 master->ethtool_ops = ds->dst->master_orig_ethtool_ops;
147 void dsa_cpu_dsa_destroy(struct dsa_port *port)
149 struct device_node *port_dn = port->dn;
151 if (of_phy_is_fixed_link(port_dn))
152 of_phy_deregister_fixed_link(port_dn);
155 static int dev_is_class(struct device *dev, void *class)
157 if (dev->class != NULL && !strcmp(dev->class->name, class))
163 static struct device *dev_find_class(struct device *parent, char *class)
165 if (dev_is_class(parent, class)) {
170 return device_find_child(parent, class, dev_is_class);
173 struct net_device *dsa_dev_to_net_device(struct device *dev)
177 d = dev_find_class(dev, "net");
179 struct net_device *nd;
190 EXPORT_SYMBOL_GPL(dsa_dev_to_net_device);
192 static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev,
193 struct packet_type *pt, struct net_device *orig_dev)
195 struct dsa_switch_tree *dst = dev->dsa_ptr;
196 struct sk_buff *nskb = NULL;
198 if (unlikely(dst == NULL)) {
203 skb = skb_unshare(skb, GFP_ATOMIC);
207 nskb = dst->rcv(skb, dev, pt, orig_dev);
214 skb_push(skb, ETH_HLEN);
215 skb->pkt_type = PACKET_HOST;
216 skb->protocol = eth_type_trans(skb, skb->dev);
218 skb->dev->stats.rx_packets++;
219 skb->dev->stats.rx_bytes += skb->len;
221 netif_receive_skb(skb);
226 static struct packet_type dsa_pack_type __read_mostly = {
227 .type = cpu_to_be16(ETH_P_XDSA),
228 .func = dsa_switch_rcv,
231 static int __init dsa_init_module(void)
235 rc = dsa_slave_register_notifier();
239 rc = dsa_legacy_register();
243 dev_add_pack(&dsa_pack_type);
247 module_init(dsa_init_module);
249 static void __exit dsa_cleanup_module(void)
251 dsa_slave_unregister_notifier();
252 dev_remove_pack(&dsa_pack_type);
253 dsa_legacy_unregister();
255 module_exit(dsa_cleanup_module);
258 MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips");
259 MODULE_LICENSE("GPL");
260 MODULE_ALIAS("platform:dsa");